| assessment of heavy-metal profile of the new calabar river and its impact on juvenile clarias gariepinus. | we have determined the heavy-metal status of the lower reaches of the new calabar river in the niger delta region over a 40-km-long distance, and its impact on the development of catfish (juvenile clarias gariepinus). the total mean concentrations of dissolved trace metals in the river were 0.01, 0.85, 0.56, 2.08, 0.05, 12.0, and 6.59 mg/l for hg, pb, cd, cu, cr, fe, and zn, respectively. the accumulated concentration of trace metals in the muscles of different mature fish caught from the river ... | 2006 | 17193219 |